Discussions By Condition: Mental conditions

Need Help

My wife has been very upset, not sleeping or eating much at all. She says her mind is racing from one senarieo to teh next, each thought worse. As an axample she will go from why didn't I kiss her, to am I still attracted to her, to an I having an affare. Her parents have a history of these type of thoughts in their relationships. Is this depression, bipolar or something else? How can I help her?